You can. It is just that the costs of pipes (wires) are so high that you can't both charge a reasonable price and pay for the pipes. This is why most farms are on private wells - $10k to drill a well is cheaper over 50 years than pipes to each farm. (Many Iowa farms are on public water not a well because wells in those parts tend to not produce enough water for a house's need - and they pay a lot of money per month to pay for those pipes)

This is why we say utilities are a natural monopoly. If you have the pipes/wires in place and even a little paid off you can undercut and competitor until they are bankrupt.